I have an HP BL460c blade enclosure with Virtual Connect Flex10 switch connecting to a 6509 running CAT OS via two separate LACP etherchannel groups, and each group has two 1GB links to the 6509. I am having some strange layer 2 connectivity issues with the blade server on the HP blade enclosure. From the HP blade server for some reason I am not able to ping another server (a regular HP 2U server) and both servers are connected to the same 6509 module and are on the same VLAN. And from the sniffer trace I learned that the issue has something to do with ARP. It seems like there is no ARP response when I try to ping. So I was able to come up with a workaround for the time being by manually add static ARP entry on both servers (HP blade server and the regular HP 2U server). At this point I suspect it's something with the LACP eitherchannel link between the 6509 and HP blade center but I don't know what would cause the issue.
I appreciate any inputs/suggestions !!! and thanks in advance !!!